{
  "name": "语法树 GrammarTree",
  "short_name": "语法树",
  "description": "手机上的英语语法知识树：知识点卡片、三种题型、错题本与间隔重复复习。",
  "start_url": "/",
  "scope": "/",
  "display": "standalone",
  "background_color": "#f0f1f5",
  "theme_color": "#ff6b4a",
  "lang": "zh-CN",
  "orientation": "any",
  "icons": [
    {
      "src": "/icons/icon-192.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "/icons/icon-512.png",
      "sizes": "512x512",
      "type": "image/png"
    },
    {
      "src": "/icons/icon-maskable-512.png",
      "sizes": "512x512",
      "type": "image/png",
      "purpose": "maskable"
    }
  ]
}